package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        // Spring框架提供的对象拷贝工具类
        BeanUtils.copyProperties(employeeDTO, employee);

        // 设置账号状态 默认1为正常
        employee.setStatus(StatusConstant.ENABLE);

        // 设置密码 默认为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(
                PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        // 该字段已设置为公共字段统一配置
        // 记录当前创建时间和修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//
//        employee.setCreateUser(BaseContext.getCurrentId());  // 已在拦截器上存入id值，此步骤为取出
//        employee.setUpdateUser(BaseContext.getCurrentId());

//        使用数据库插入
        employeeMapper.insert(employee);
    }


    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // select * from employee limit 0,10

        // 引入第三方 mybatis 的PageHelper插件简化分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage()
                , employeePageQueryDTO.getPageSize()); // 底层会自动给我们拼接limit动态SQL

        Page<Employee> page = employeeMapper.PageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total, records);
    }

    /**
     * 禁用启用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();

        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(long id) {
        Employee employee = employeeMapper.getById(id);
        // 防止密码泄露
        employee.setPassword("******");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 拷贝属性赋值到相应的employee实体类中
        BeanUtils.copyProperties(employeeDTO, employee);

//        employee.setUpdateTime(LocalDateTime.now());
//        // 利用ThreadLocal技术获得操作者的id
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }


}
